What should I do : Focus on Digital Media Marketing (USA) or building my current business ?

I have a business where I sell paintings via auction houses & eBay and making about 1000 -2000 $ per month.
But since 2 years I started my little digital agency for restaurants. Which made me about 500 $ per month for 2 years and then my client went off ..

I spend soo much energy leaing sales skills, door to door etc. Watched hours of courses.
Right now in 2021: I have 2 Realtor Clients whom I could not deliver the results because they didn't last longer than for 1 month.

And most of the...

What should I do : Focus on Digital Media Marketing (USA) or building my current business ?